66109106811 has 8 divisors (see below), whose sum is σ = 96158700864. Its totient is φ = 40066125320.

The previous prime is 66109106809. The next prime is 66109106831. The reversal of 66109106811 is 11860190166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66109106811 - 2¹ = 66109106809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66109106811.

It is not an unprimeable number, because it can be changed into a prime (66109106831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1001653101 + ... + 1001653166.

It is an arithmetic number, because the mean of its divisors is an integer number (12019837608).

Almost surely, 2^66109106811 is an apocalyptic number.

66109106811 is a deficient number, since it is larger than the sum of its proper divisors (30049594053).

66109106811 is a wasteful number, since it uses less digits than its factorization.

66109106811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2003306281.

The product of its (nonzero) digits is 15552, while the sum is 39.

Adding to 66109106811 its reverse (11860190166), we get a palindrome (77969296977).

The spelling of 66109106811 in words is "sixty-six billion, one hundred nine million, one hundred six thousand, eight hundred eleven".